You cannot pass boolean variables in android by reference… here is a solution to the problem.
You cannot pass boolean variables in android by reference
I’m using the touchevent listner that records touches, and I’m already using ViewPager for swping: We know that Java’s downside is passing by value, and I’m still trying to pass boolean values in anonymous inner classes. Values changed in Switch STMT are not persisted outside of Switch STMT. flag2 value. Does anyone have a solution for this? My code is as follows
parent.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
flag2=!flag2;
switch(event.getAction())
{
case MotionEvent.ACTION_MOVE:
awesomePager.requestDisallowInterceptTouchEvent(true);
flag2=false;
break;
case MotionEvent.ACTION_UP:
awesomePager.requestDisallowInterceptTouchEvent(true);
if(flag)
{
upperdock.setClickable(false);
upperdock.bringToFront();
tocparent.bringToFront();
tocbottom.bringToFront();
upperdock.setVisibility(RelativeLayout.VISIBLE);
tocparent.setVisibility(LinearLayout.VISIBLE);
tocbottom.setVisibility(LinearLayout.VISIBLE);
flag=false;
obj.one(event.getAction());
}
else
{
parent.bringToFront();
upperdock.setVisibility(RelativeLayout.INVISIBLE);
tocparent.setVisibility(LinearLayout.INVISIBLE);
tocbottom.setVisibility(LinearLayout.INVISIBLE);
flag=true;
obj.one(event.getAction());
}
flag2=true;
break;
case MotionEvent.ACTION_CANCEL:
awesomePager.requestDisallowInterceptTouchEvent(false);
flag2=false;
break;
}
return flag2;
}
});
public class SimpleViewPagerforAndroidActivity extends Activity { /** Called when the activity is first created. */ boolean flag2=true; rest of the code }
Please help… Need it….
package com.beanie.samples.viewpager;
set of imports
public class SimpleViewPagerforAndroidActivity extends Activity {
/** Called when the activity is first created. */
volatile boolean flag2=true;
AwesomePagerAdapter awe1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
cxt = this;
data = new ArrayList<WebView>();
awesomePager = (ViewPager) findViewById(R.id.viewPager);
awesomePager.setAdapter(new AwesomePagerAdapter(this,data));
Bundle extras = getIntent().getExtras();
Boolean dock2checked = extras.getBoolean("dock1");
if(dock2checked)
{
Toast toast1 = Toast.makeText(getBaseContext(), Boolean.toString(dock2checked), 5000);
toast1.show();
}
else
{
Toast toast1 = Toast.makeText(getBaseContext(), Boolean.toString(dock2checked), 5000);
toast1.show();
}
awesomePager.setOffscreenPageLimit(11);
//
web0 = new WebView(cxt);
web0.loadUrl("file:///android_asset/1/01-Cover.html");
WebSettings webSettings0 = web0.getSettings();
webSettings0.setJavaScriptEnabled(true);
web1 = new WebView(cxt);
web1.loadUrl("file:///android_asset/1/01-Cover.html");
WebSettings webSettings1 = web1.getSettings();
webSettings1.setJavaScriptEnabled(true);
web2 = new WebView(cxt);
web2.loadUrl("file:///android_asset/5/05-01.html");
WebSettings webSettings2 = web2.getSettings();
webSettings2.setJavaScriptEnabled(true);
web3 = new WebView(cxt);
web3.loadUrl("file:///android_asset/1/01-Cover.html");
WebSettings webSettings3 = web3.getSettings();
webSettings3.setJavaScriptEnabled(true);
web4 = new WebView(cxt);
web4.loadUrl("file:///android_asset/5/05-01.html");
WebSettings webSettings4 = web4.getSettings();
webSettings4.setJavaScriptEnabled(true);
web5 = new WebView(cxt);
web5.loadUrl("file:///android_asset/1/01-Cover.html");
WebSettings webSettings5 = web5.getSettings();
webSettings5.setJavaScriptEnabled(true);
web6 = new WebView(cxt);
web6.loadUrl("file:///android_asset/5/05-01.html");
WebSettings webSettings6 = web6.getSettings();
webSettings6.setJavaScriptEnabled(true);
web7 = new WebView(cxt);
web7.loadUrl("file:///android_asset/1/01-Cover.html");
WebSettings webSettings7 = web7.getSettings();
webSettings7.setJavaScriptEnabled(true);
web8 = new WebView(cxt);
web8.loadUrl("file:///android_asset/5/05-01.html");
WebSettings webSettings8 = web8.getSettings();
webSettings8.setJavaScriptEnabled(true);
web9 = new WebView(cxt);
web9.loadUrl("file:///android_asset/1/01-Cover.html");
WebSettings webSettings9 = web9.getSettings();
webSettings9.setJavaScriptEnabled(true);
web10 = new WebView(cxt);
web10.loadUrl("file:///android_asset/5/05-01.html");
WebSettings webSettings10 = web10.getSettings();
webSettings10.setJavaScriptEnabled(true);
data.add(web0);
data.add(web1);
data.add(web2);
data.add(web3);
data.add(web4);
data.add(web5);
data.add(web6);
data.add(web7);
data.add(web8);
data.add(web9);
data.add(web10);
tocparent=(LinearLayout) findViewById(R.id.tocparent);
dock2=(Button)findViewById(R.id.button1);
dock2.setVisibility(Button.INVISIBLE);
tocparent.setVisibility(LinearLayout.INVISIBLE);
topmost=(RelativeLayout) findViewById(R.id.topmost);
parent=(RelativeLayout) findViewById(R.id.rl1);
upperdock=(RelativeLayout) findViewById(R.id.upperdock);
tocparent=(LinearLayout) findViewById(R.id.tocparent);
tocbottom=(LinearLayout) findViewById(R.id.linearLayout3);
upperdock.setVisibility(RelativeLayout.INVISIBLE);
tocparent.setVisibility(LinearLayout.INVISIBLE);
tocbottom.setVisibility(LinearLayout.INVISIBLE);
web0.loadUrl("javascript:fhhf()");
parent.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
flag2=!flag2;
switch(event.getAction())
{
case MotionEvent.ACTION_MOVE:
awesomePager.requestDisallowInterceptTouchEvent(true);
flag2=false;
break;
case MotionEvent.ACTION_UP:
awesomePager.requestDisallowInterceptTouchEvent(true);
if(flag)
{
upperdock.setClickable(false);
upperdock.bringToFront();
tocparent.bringToFront();
tocbottom.bringToFront();
upperdock.setVisibility(RelativeLayout.VISIBLE);
tocparent.setVisibility(LinearLayout.VISIBLE);
tocbottom.setVisibility(LinearLayout.VISIBLE);
flag=false;
obj.one(event.getAction());
}
else
{
parent.bringToFront();
upperdock.setVisibility(RelativeLayout.INVISIBLE);
tocparent.setVisibility(LinearLayout.INVISIBLE);
tocbottom.setVisibility(LinearLayout.INVISIBLE);
flag=true;
obj.one(event.getAction());
}
flag2=true;
break;
case MotionEvent.ACTION_CANCEL:
awesomePager.requestDisallowInterceptTouchEvent(false);
flag2=false;
Toast.makeText(getApplicationContext(), s, 220).show();
obj.one(event.getAction());
break;
}
/* if(event.getAction()==MotionEvent.ACTION_UP)
{
flag2=true;
}
else if(event.getAction()==MotionEvent.ACTION_CANCEL)
{
flag2=false;
}*/
return flag2;
}
});
awesomePager.setOnPageChangeListener(new OnPageChangeListener() {
public void onPageSelected(int arg0) {
Toast toast1 = Toast.makeText(getBaseContext(), "PageSelected"+ arg0, 5000);
Toast1.show();
if(arg0==0)
{
web0.loadUrl("javascript:fhhf()");
awesomePager.getChildAt(arg0 - 1);
web0.loadUrl("javascript:fhhf1()");
web0.loadUrl("javascript:fhhf()");
}
else if(arg0==1)
{
web1.loadUrl("javascript:fhhf1()");
web1.loadUrl("javascript:fhhf()");
}
else if(arg0==3)
{
web3.loadUrl("javascript:fhhf1()");
Toast toast2 = Toast.makeText(getBaseContext(), "fun"+ arg0, 5000);
Toast2.show();
}
else if(arg0==5)
web5.loadUrl("javascript:fhhf()");
else if(arg0==7)
web7.loadUrl("javascript:fhhf()");
else if(arg0==9)
web9.loadUrl("javascript:fhhf()");
}
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
public void onPageScrollStateChanged(int arg0) {
TODO Auto-generated method stub
int o = awesomePager.getCurrentItem();
WebView temp = (WebView) awesomePager.getChildAt(o);
if(arg0 == 1)
{
temp.loadUrl("javascript:fhhf1()");
}
else if(arg0 == 0)
{
temp.loadUrl("javascript:fhhf()");
}
}
});
}
public boolean fun1()
{
return true;
}
public boolean fun2()
{
return false;
}
private class AwesomePagerAdapter extends PagerAdapter implements ViewPager.OnPageChangeListener {
private List<WebView> data;
private Context ctx1;
public AwesomePagerAdapter(Context ctx, List<WebView> data) {
this.ctx1 = ctx;
this.data = data;
}
@Override
public int getCount() {
return NUM_AWESOME_VIEWS;
}
@Override
public Object instantiateItem(View collection, int position) {
data.get(position).setBackgroundColor(R.color.black);
return data.get(position);
}
@Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager) collection).removeView((WebView) view);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view==((WebView)object);
}
@Override
public void finishUpdate(View arg0) {
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {}
public void onPageScrollStateChanged(int position) {
}
public void onPageScrolled(int arg0, float arg1, int arg2) {
TODO Auto-generated method stub
}
public void onPageSelected(int position) {
}
}
}
Thanks in advance
Solution
Start by creating a method in SimpleViewPagerforAndroidActivity as shown below, and you can also use void if you don’t want to return anything
boolean method(Boolean flag){
flag2=flag;
return flag2;
}
Create an object in another class as follows
SimpleViewPagerforAndroidActivity abc=new SimpleViewPagerforAndroidActivity();
And call the method through the switch statement in the ontouch event
abc.method(false or true);
This will update your flag2 and you can check it by printing it in Log by
Log.d("flag2",""+abc.flag2);